JavaScript: Replace the first digit in a string (should contains at least digit) with $ character
JavaScript Basic: Exercise-136 with Solution
Write a JavaScript program to replace the first digit in a string (should contains at least digit) with $ character.
Pictorial Presentation:

Sample Solution:
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>Replace the first digit in a string (should contains at least digit) with $ character</title>
</head>
<body>
</body>
</html>
JavaScript Code:
function replace_first_digit(input_str) {
return input_str.replace(/[0-9]/, '$');
}
console.log(replace_first_digit("abc1dabc"));
console.log(replace_first_digit("p3ython"));
console.log(replace_first_digit("ab1cabc"));
Sample Output:
abc$dabc p$ython ab$cabc
Flowchart:

ES6 Version:
function replace_first_digit(input_str) {
return input_str.replace(/[0-9]/, '$');
}
console.log(replace_first_digit("abc1dabc"));
console.log(replace_first_digit("p3ython"));
console.log(replace_first_digit("ab1cabc"));
Live Demo:
See the Pen javascript-basic-exercise-136 by w3resource (@w3resource) on CodePen.
Improve this sample solution and post your code through Disqus
Previous:Write a JavaScript program to remove all characters from a given string that appear more than once.
Next: Write a JavaScript program to test if a given integer is greater than 15 return the given number, otherwise return 15.
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
JavaScript: Tips of the Day
Returns true if the elements of the first array are contained in the second one regardless of order, false otherwise
Example:
const tips_ContainedIn = (a, b) => { for (const v of new Set(a)) { if (!b.some(e => e === v) || a.filter(e => e === v).length > b.filter(e => e === v).length) return false; } return true; }; console.log(tips_ContainedIn([1, 4, 5], [2, 4, 1, 5, 6]));
Output:
true
- Weekly Trends
- Java Basic Programming Exercises
- SQL Subqueries
- Adventureworks Database Exercises
- C# Sharp Basic Exercises
- SQL COUNT() with distinct
- JavaScript String Exercises
- JavaScript HTML Form Validation
- Java Collection Exercises
- SQL COUNT() function
- SQL Inner Join
- JavaScript functions Exercises
- Python Tutorial
- Python Array Exercises
- SQL Cross Join
- C# Sharp Array Exercises